Challenge yourself with this physics quiz covering key topics like Motion, Newton’s Laws, Work and Energy, Heat, Waves, Light, Electricity, Atomic Physics, and Simple Machines. It’s designed to help you strengthen your understanding, practice concepts, and have fun while learning. At the end, Score yourself with the answers and explanations.
PHYSICS QUIZ – 50 QUESTIONS
MEASUREMENTS AND UNITS
1. The SI unit of length is
A. Meter
B. Kilogram
C. Second
D. Ampere
2. The SI unit of mass is
A. Meter
B. Kilogram
C. Newton
D. Joule
3. The SI unit of time is
A. Second
B. Minute
C. Hour
D. Day
4. The instrument used to measure mass is
A. Ruler
B. Balance
C. Stopwatch
D. Thermometer
5. The SI unit of force is
A. Joule
B. Watt
C. Newton
D. Pascal
MOTION AND SPEED PHYSICS QUIZ
6. Speed is defined as
A. Distance × Time
B. Distance ÷ Time
C. Force ÷ Mass
D. Mass × Acceleration
7. The SI unit of speed is
A. m/s
B. m²
C. kg
D. N
8. Velocity differs from speed because it includes
A. Distance
B. Acceleration
C. Direction
D. Mass
9. A car moves 100 m in 5 s. Its speed is
A. 20 m/s
B. 5 m/s
C. 25 m/s
D. 50 m/s
10. Acceleration is the rate of change of
A. Mass
B. Velocity
C. Force
D. Distance
LAWS OF MOTION PHYSICS QUIZ
11. Newton’s first law is also called
A. Law of acceleration
B. Law of inertia
C. Law of momentum
D. Law of energy
12. A body at rest remains at rest due to
A. Friction
B. Gravity
C. Inertia
D. Pressure
13. A body in motion remains in motion unless
A. Force acts
B. Time stops
C. Mass increases
D. Energy is lost
14. Newton’s second law formula is
A. F = mv
B. F = ma
C. F = m/a
D. F = v/m
15. Force is measured in
A. Newton
B. Joule
C. Watt
D. Pascal
16. A heavy object is harder to move because
A. It is heavy
B. Mass resists acceleration
C. Force is less
D. Distance is long
17. Acceleration is
A. Force ÷ Mass
B. Mass ÷ Force
C. Force × Mass
D. Mass × Velocity
18. Newton’s third law states that
A. Action = Reaction
B. Force = Mass × Acceleration
C. Energy = Work ÷ Time
D. Speed = Distance ÷ Time
19. Action and reaction forces act on
A. Same body
B. Different bodies
C. Only moving objects
D. Only stationary objects
20. Recoil of a gun occurs due to
A. Friction
B. Gravity
C. Action and reaction
D. Inertia
WORK, ENERGY, AND POWER
21. Work is done when a force
A. Pushes without motion
B. Produces motion in the direction of force
C. Creates heat
D. Makes sound
22. The SI unit of work is
A. Watt
B. Newton
C. Joule
D. Pascal
23. Energy is the ability to
A. Make sound
B. Do work
C. Produce heat only
D. Stop motion
24. Power is defined as
A. Work ÷ Time
B. Force × Distance
C. Energy × Time
D. Force ÷ Mass
25. Kinetic energy formula is
A. KE = ½ mv²
B. KE = mv²
C. KE = mgh
D. KE = mv
HEAT AND THERMODYNAMICS
26. Heat is energy that flows from
A. Cold to hot
B. Hot to cold
C. Object to object without difference
D. Energy to mass
27. The SI unit of heat is
A. Joule
B. Watt
C. Newton
D. Kelvin
28. Temperature is a measure of
A. Energy
B. Heat
C. Average kinetic energy of particles
D. Mass
29. Conduction transfers heat through
A. Liquids
B. Solids
C. Gases only
D. Vacuum only
30. The thermometer measures
A. Pressure
B. Temperature
C. Heat
D. Force
WAVES AND SOUND PHYSICS QUIZ
31. Sound is a
A. Light wave
B. Mechanical wave
C. Electromagnetic wave
D. Radio wave
32. Sound cannot travel through
A. Solid
B. Liquid
C. Gas
D. Vacuum
33. The pitch of sound depends on
A. Amplitude
B. Frequency
C. Speed
D. Medium
34. Echo is produced due to
A. Refraction
B. Reflection
C. Diffraction
D. Absorption
35. Loudness of sound depends on
A. Frequency
B. Amplitude
C. Wavelength
D. Speed
LIGHT AND OPTICS PHYSICS QUIZ
36. Light travels fastest in
A. Air
B. Water
C. Glass
D. Vacuum
37. Reflection occurs when light
A. Bends
B. Changes medium
C. Bounces back
D. Stops
38. Refraction is the bending of light when it
A. Hits a mirror
B. Passes from one medium to another
C. Gets absorbed
D. Travels straight
39. A concave lens is used to
A. Converge light
B. Diverge light
C. Stop light
D. Reflect light
40. Rainbow is formed due to
A. Reflection
B. Refraction and dispersion
C. Absorption
D. Diffraction
ELECTRICITY AND MAGNETISM
41. Current is the flow of
A. Protons
B. Neutrons
C. Electric charges
D. Light
42. SI unit of current is
A. Volt
B. Ampere
C. Ohm
D. Watt
43. Resistance is measured in
A. Ohm
B. Volt
C. Ampere
D. Joule
44. A conductor allows
A. Easy flow of electricity
B. No flow of electricity
C. Reflection
D. Absorption
45. Magnetic field is produced by
A. Electric current
B. Heat
C. Light
D. Mass
ATOMIC AND NUCLEAR PHYSICS
46. The central part of an atom is the
A. Electron
B. Proton
C. Nucleus
D. Neutron
47. Radioactive decay produces
A. Heat only
B. Light only
C. Radiation
D. Force
48. Nuclear fission is
A. Joining of nuclei
B. Splitting of a nucleus
C. Electron movement
D. Proton decay
49. Alpha particles contain
A. 2 protons and 2 neutrons
B. 1 proton only
C. 2 electrons
D. 1 neutron only
50. Beta particles are
A. Neutrons
B. Electrons
C. Protons
D. Photons
PHYSICS QUIZ ANSWERS AND EXPLANATIONS
1. Answer: A – Meter is the SI unit of length.
2. Answer: B – Mass is measured in kilograms.
3. Answer: A – Time is measured in seconds.
4. Answer: B – Balance measures mass.
5. Answer: C – Force is measured in newtons.
6. Answer: B – Speed = Distance ÷ Time.
7. Answer: A – m/s is the SI unit of speed.
8. Answer: C – Velocity includes direction.
9. Answer: A – 100 ÷ 5 = 20 m/s.
10. Answer: B – Acceleration = Rate of change of velocity.
11. Answer: B – First law = law of inertia.
12. Answer: C – Body resists change in motion.
13. Answer: A – External force needed to change motion.
14. Answer: B – F = ma.
15. Answer: A – Force measured in newtons.
16. Answer: B – Heavier mass resists acceleration.
17. Answer: A – a = F ÷ m.
18. Answer: C – Equal and opposite reaction.
19. Answer: B – Action and reaction act on different bodies.
20. Answer: C – Gun recoils due to reaction.
21. Answer: B – Work requires motion in force direction.
22. Answer: C – Joule is unit of work.
23. Answer: B – Energy is ability to do work.
24. Answer: A – Power = Work ÷ Time.
25. Answer: A – KE = ½mv².
26. Answer: B – Heat flows from hot to cold.
27. Answer: A – Joule is unit of heat.
28. Answer: C – Temperature measures average kinetic energy.
29. Answer: B – Conduction occurs in solids.
30. Answer: B – Thermometer measures temperature.
31. Answer: B – Sound is a mechanical wave.
32. Answer: D – Sound cannot travel in vacuum.
33. Answer: B – Pitch depends on frequency.
34. Answer: B – Echo = reflection of sound.
35. Answer: B – Loudness depends on amplitude.
36. Answer: D – Light travels fastest in vacuum.
37. Answer: C – Reflection = bounce back.
38. Answer: B – Refraction = bending in new medium.
39. Answer: B – Concave lens diverges light.
40. Answer: B – Rainbow = refraction + dispersion.
41. Answer: C – Current = flow of electric charges.
42. Answer: B – Ampere = unit of current.
43. Answer: A – Resistance measured in ohms.
44. Answer: A – Conductor allows current to pass.
45. Answer: A – Electric current produces magnetic field.
46. Answer: C – Nucleus is central part of atom.
47. Answer: C – Radioactive decay emits radiation.
48. Answer: B – Fission = splitting of nucleus.
49. Answer: A – Alpha = 2 protons + 2 neutrons.
50. Answer: B – Beta particles are electrons.
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